Android: You've always been able to view live traffic info from Google Maps Navigation on Android, but Google recently updated the way Navigation works to include traffic info when deciding which route is the fastest. So, if there's a traffic jam on your usual freeway, Navigation will automatically give you a different route. You don't have to do anything, or even update the app—as of today, Navigation will just automatically pick the fastest route with traffic taken into account. Check out Google's blog post for more information. [Official Google Mobile Blog]